3494 Percina gymnocephala Pegym_u0.jpg http://www.fishbase.org/images/species/Pegym_u0.jpg http://www.fishbase.org/images/thumbnails/jpg/tn_Pegym_u0.jpg Crippen, C. Pegym_f0.jpg http://www.fishbase.org/images/species/Pegym_f0.jpg http://www.fishbase.org/images/thumbnails/jpg/tn_Pegym_f0.jpg N. Burkhead & R. Jenkins, courtesy of VDGIF Pegym_m0.jpg http://www.fishbase.org/images/species/Pegym_m0.jpg http://www.fishbase.org/images/thumbnails/jpg/tn_Pegym_m0.jpg N. Burkhead & R. Jenkins, courtesy of VDGIF